Technical specification

Property / Unit Tolerance Standards

Grammage, g/m2 ±4% 205 230 255 ISO 536

Thickness, µm ±5% 380 445 495 ISO 534

Bending moment Taber 15° MD, mNm -15% 12.9 19.2 26.3 TAPPI 489 om-99

Bending moment Taber 15° CD, mNm -15% 5.1 7.7 10.5 TAPPI 489 om-99

Bending resistance L&W 15° MD, mN -15% 266 400 544 ISO 2493

Bending resistance L&W 15° CD, mN -15% 106 160 218 ISO 2493

Moisture, % ±1 7.5 7.5 7.5 ISO 287

Surface Smoothness, Bendtsen, ml/min, Top max 700 400 400 400 SCAN P 84:02

Surface Smoothness, Bendtsen, ml/min, Reverse max 2000 700 700 700 SCAN P 84:02

Tearing resistance MD, mN -800 2900 3400 3900 TAPPI 496 sp-99

Tearing resistance CD, mN -800 3300 3800 4300 TAPPI 496 sp-99

Cobb 60, g/m2, Top 30 30 30 ISO 535

Cobb 60, g/m2, Reverse 30 30 30 ISO 535

Unbleached chemical pulp

Unbleached chemical pulp and CTMP

Unbleached chemical pulp

CKB NudeTM

Issued: 08.2017 Cancels: 08.2016

Multilayer kraft board

All properties according to Skoghall Mill measurements from board machine production. Laboratory test climate 23°C/50% RH (According to ISO 187). Tolerances based upon 95% confidence limits, apply to delivered reel/pallet average. Bending moment Taber 15° and Bending resistance L&W 15° are binding, Bending moment Taber 15º calculated from Bending resistance L&W 15º.

CKB Nude is an uncoated, brown, multilayer kraft back board made of unbleached chemical pulp and additional CTMP in the middle layer. The all-brown board has a natural look and feel, but is fully made of virgin fibre.

CKB NudeTM

Multilayer kraft board

CertificatesQuality management ISO 9001 Environmental management ISO 14001 Product safety FSSC 22000 Health and safety OHSAS 18001 Energy management ISO 50001

FSC and PEFC certified board available upon request.

Paperboard is recyclable

Key characteristics and main endusesCKB Nude has been designed to meet consumer preferences for sustainable, renewable and recyclable packaging materials with a natural look and feel. Made from pure virgin fibre, CKB Nude is a safe choice for food packaging but also for many other products, such as beverage, cosmetics and luxury packaging. CKB Nude provides a fantastic opportunity to differentiate a brand on the shelf. Its eye-catching and organic appeal embraces the beauty of nature’s own shades of brown – creating a look that is both timeless and trendy. CKB Nude offers great stiffness, strength, runnability and convertibility.

Printing and finishing techniquesThe product can be used with different printing techniques such as offset, flexo and digital printing. In digital printing, the product is suitable for several different sheet- or web-fed presses. Inkjet, dry or liquid toner technology can be used, although in some cases, pretreatment of the substrate might be required. The latest certification status can be verified on the press manufacturer’s website or with local Stora Enso representatives. It is important to check the limitations of the equipment, particularly because of the exceptional difference in the thickness and stiffness of board compared with paper in the same grammages. When running thicker substrates, the press manufacturer’s recommendations should be referred to for optimal grain direction. Essentially all of the same finishing processes apply to both digitally printed and offset printed work. Since a wide variety of digital printing equipment is available in the market, it is important that a new commercial print job is always preceded by a trial run, including all required printing and converting process phases. The product works very well with different finishing techniques, such as embossing, hot foil stamping and others.

Storage recommendationsFor optimal printing results, the moisture proof wrapping should not be removed until the board has reached the temperature of the press room.

Pallet/Reel Weight (kg)

Difference in temperature between board and press room (press room temp. approx. 20°C)

10°C 20°C 30°C

400 kg 2 days 2 days 3 days

800 kg 2 days 3 days 4 days

1200 kg 2 days 4 days 5 days

The product properties, according to the specifications, are guaranteed for 12 months after the production date. In order to ensure product safety, the product must be well wrapped and stored indoors, sheltered from rain and snow. The recommended storage conditions are 50-55% relative humidity and 20-23°C.